US3422688A - Arrangement for counterbalancing the forces in crankshaft driven machines - Google Patents

Arrangement for counterbalancing the forces in crankshaft driven machines Download PDF

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Publication number
US3422688A
US3422688A US598641A US3422688DA US3422688A US 3422688 A US3422688 A US 3422688A US 598641 A US598641 A US 598641A US 3422688D A US3422688D A US 3422688DA US 3422688 A US3422688 A US 3422688A
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counter
arrangement
crankshaft
weights
pivotally connected
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US598641A
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Egon Bruderer
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Bruderer AG
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Bruderer AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/22—Compensation of inertia forces
    • F16F15/26—Compensation of inertia forces of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system, i.e. masses connected through a kinematic mechanism or gear system
    • F16F15/261—Compensation of inertia forces of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system, i.e. masses connected through a kinematic mechanism or gear system where masses move linearly
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0064—Counterbalancing means for movable press elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18208—Crank, pitman, and slide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2142—Pitmans and connecting rods
    • Y10T74/2154—Counterbalanced
    • Y10T74/2156—Weight type

Definitions

  • An object of the invention is to provide arrangements for effecting a relatively simple, yet effective, counterbalancing of the reciprocating parts in a crankshaft driven machine.
  • an arrangement of the above character which comprises a member mounted for reciprocation; a crankshaft, a connecting rod pivotally connected to said crankshaft and said member for reciprocating the latter when the crank shaft is rotated, two spaced-apart counterweights, one located on each side of said member; an individual pivotally mounted lever pivotally connected on one side of the pivot point thereof to each of said counterweights; an individual rod pivotally connected to said member and to a respective said lever on the other side of the pivot point thereof, whereby reciprocation of said member causes a reciprocation in the opposite sense of said counterweights; and means connected to said counterweights for preventing uncontrolled swinging of said counterweights during reciprocation thereof.
  • FIGURE 1 is a view in cross section of one embodiment of the invention
  • FIGURE 2 is a view similar to that of FIGURE 1 of a second embodiment of the invention.
  • FIGURE 3 is a view similar to that of FIGURE 1 of a third embodiment of the invention.
  • the crankshaft 1 is connected by a pin to the connecting rod 2, which is pivotally connected to a reciprocating member, such as a cross head or piston 3, which reciprocally slides in the machine housing 4.
  • a reciprocating member such as a cross head or piston 3
  • Two rods 5 are pivotally connected to the piston 3.
  • Each rod is pivotally connected to one end of a lever 6 with equal arms and by the lever 6 to one end of a respective counter weight 7 which is pivotally connected to the other end of the corresponding lever 6.
  • the two counter-weights are located on opposite sides of the piston 3 and their broad surfaces extend trans- 3,422,688 Patented Jan. 21, 1969 versely to the stroke direction of the piston.
  • the other end of each counter-weight is connected to the housing 4 by respective pivotally mounted rods 8.
  • the counter-weights 7 are pivotally connected together by a pivot 12, and thereby are prevented from swinging loosely from their pivotal connection to the levers 6.
  • the rods 8 are replaced by the pivotally mounted rods 9, which are pivotally connected to the shorter arm of respective pivotally mounted levers 10, the longer arms of which are pivotally connected to respective rods 11 which are pivotally connected to the crankshaft 1.
  • the counter-weights 7 move in the direction of the piston stroke but in the opposed sense. They also have a component of movement that is transverse to the piston stroke, whereby the forces arising from rotation of the crankshaft 1 are also counterbalanced.
  • the arrangement of the counter-weights and their drive from the crankshaft is completely isolated from the main crank assembly of the machine (not shown), in the embodiments described.
  • the counter-weights in no way adversely influence the correct operation of the machine.
  • Arrangement for counterbalancing the reciprocating parts of a crankshaft driven machine including a member mounted for reciprocation; a crankshaft, a connecting rod pivotally connected to said crankshaft and said member for reciprocating the latter when the crankshaft is rotated, two spaced-apart counter-weights, one located on each side of said member; an individual pivotally mounted lever pivotally connected on one side of the pivot point thereof to each of said counter-weights; an individual rod pivotally connected to said member and to a respective said lever on the other side of the pivot point thereof, whereby reciprocation of said member causes a reciprocation in the opposite sense of said counter-weights; and means connected to said counter-weights for preventing uncontrolled swinging of said counter-weights during reciprocation thereof.
  • each said lever has equal arms
  • said means for preventing uncontrolled swinging of the counter-weights comprise an individual rod pivotally connected to a respective counterweight and to a fixed point.
  • said means for preventing uncontrolled swinging of the counter-weights comprises an individual pivotally mounted twoarm lever pivotally connected on one side of the pivot point thereof to each said counter-weight, an individual rod pivotally connected at one end to a respective said two-arm lever and at the other end to said crankshaft at a point eccentric from the center thereof, whereby each counter-weight is caused to have a component of movement that is transverse of the movement of said member, for counterbalancing the forces arising from the rotation of said crankshaft.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Reciprocating Pumps (AREA)
  • Press Drives And Press Lines (AREA)

Description

BRUDERER ARRANGEMENT FOR COUNTERBALANCING THE FORCES IN CRANKSHAFT DRIVEN MACHINES Filed Dec.
United States Patent 3,422,688 ARRANGEMENT FOR COUNTERBALANCING THE FORCES IN CRANKSHAFT DRIVEN MACHINES Egon Bruderer, Neukirch, Switzerland, assignor to Bruderer AG, Arbon, Thurgau, Switzerland Filed Dec. 2, 1966, Ser. No. 598,641 Claims priority, applicatio6n6gzvitzerland, Dec. 2, 1965,
US. CI. 74-44 Claims Int. Cl. F16h 21 /22 ABSTRACT OF THE DISCLOSURE In order to have quiet operation and to avoid heavy and strong supporting surfaces, it is necessary with crankshaft driven machines, such as crank and punch presses or embossing machines, to counterbalance the heavy reciprocating parts.
An object of the invention is to provide arrangements for effecting a relatively simple, yet effective, counterbalancing of the reciprocating parts in a crankshaft driven machine.
In accordance with the invention there is provided an arrangement of the above character which comprises a member mounted for reciprocation; a crankshaft, a connecting rod pivotally connected to said crankshaft and said member for reciprocating the latter when the crank shaft is rotated, two spaced-apart counterweights, one located on each side of said member; an individual pivotally mounted lever pivotally connected on one side of the pivot point thereof to each of said counterweights; an individual rod pivotally connected to said member and to a respective said lever on the other side of the pivot point thereof, whereby reciprocation of said member causes a reciprocation in the opposite sense of said counterweights; and means connected to said counterweights for preventing uncontrolled swinging of said counterweights during reciprocation thereof.
The above and further objects of the invention will be apparent from the following detailed description of three embodiments of the invention, with reference to the accompanying drawing, wherein:
FIGURE 1 is a view in cross section of one embodiment of the invention;
FIGURE 2 is a view similar to that of FIGURE 1 of a second embodiment of the invention; and
FIGURE 3 is a view similar to that of FIGURE 1 of a third embodiment of the invention.
With reference to the embodiment of FIGURE 1, the crankshaft 1 is connected by a pin to the connecting rod 2, which is pivotally connected to a reciprocating member, such as a cross head or piston 3, which reciprocally slides in the machine housing 4. Two rods 5 are pivotally connected to the piston 3. Each rod is pivotally connected to one end of a lever 6 with equal arms and by the lever 6 to one end of a respective counter weight 7 which is pivotally connected to the other end of the corresponding lever 6. The two counter-weights are located on opposite sides of the piston 3 and their broad surfaces extend trans- 3,422,688 Patented Jan. 21, 1969 versely to the stroke direction of the piston. The other end of each counter-weight is connected to the housing 4 by respective pivotally mounted rods 8. When the crankshaft 1 rotates, the two counter-weights 7 moves reciprocally in the direction of the piston stroke but in a sense always opposed to the latter, whereby the forces arising from the reciprocating ports are counterbalanced.
In the embodiment of FIGURE 2 the counter-weights 7 are pivotally connected together by a pivot 12, and thereby are prevented from swinging loosely from their pivotal connection to the levers 6.
In the embodiment of FIGURE 3 the rods 8 are replaced by the pivotally mounted rods 9, which are pivotally connected to the shorter arm of respective pivotally mounted levers 10, the longer arms of which are pivotally connected to respective rods 11 which are pivotally connected to the crankshaft 1. The counter-weights 7 move in the direction of the piston stroke but in the opposed sense. They also have a component of movement that is transverse to the piston stroke, whereby the forces arising from rotation of the crankshaft 1 are also counterbalanced.
The arrangement of the counter-weights and their drive from the crankshaft is completely isolated from the main crank assembly of the machine (not shown), in the embodiments described. The counter-weights in no way adversely influence the correct operation of the machine.
With machines having an adjustable-stroke main crank assembly, the stroke of the counter-weights is automatically changed an equal amount.
The invention is not to be construed as limited to the particular forms disclosed herein, since these are to be regarded as illustrative rather than restrictive.
I claim:
1. Arrangement for counterbalancing the reciprocating parts of a crankshaft driven machine, including a member mounted for reciprocation; a crankshaft, a connecting rod pivotally connected to said crankshaft and said member for reciprocating the latter when the crankshaft is rotated, two spaced-apart counter-weights, one located on each side of said member; an individual pivotally mounted lever pivotally connected on one side of the pivot point thereof to each of said counter-weights; an individual rod pivotally connected to said member and to a respective said lever on the other side of the pivot point thereof, whereby reciprocation of said member causes a reciprocation in the opposite sense of said counter-weights; and means connected to said counter-weights for preventing uncontrolled swinging of said counter-weights during reciprocation thereof.
2. The arrangement as defined in claim 1, wherein each said lever has equal arms, and said means for preventing uncontrolled swinging of the counter-weights comprise an individual rod pivotally connected to a respective counterweight and to a fixed point.
3. The arrangement as defined in claim 1, wherein said means for preventing uncontrolled swinging of the counter-weights comprises a pivot connecting together said two counter-weights.
4. The arrangement as defined in claim 1, wherein said means for preventing uncontrolled swinging of the counter-weights comprises an individual pivotally mounted twoarm lever pivotally connected on one side of the pivot point thereof to each said counter-weight, an individual rod pivotally connected at one end to a respective said two-arm lever and at the other end to said crankshaft at a point eccentric from the center thereof, whereby each counter-weight is caused to have a component of movement that is transverse of the movement of said member, for counterbalancing the forces arising from the rotation of said crankshaft.
5. The arrangement as defined in claim 4, including an 3 individual rod pivotally connected to a respective said counter-Weight and to the corresponding said two-arm lever on said one side of the pivot point thereof.
References Cited UNITED STATES PATENTS FRED C. MA'ITERN, JR., Primary Examiner. 5 WESLEY S. RATLIFF, Assistant Examiner.
US. Cl. X.R.
US598641A 1965-12-02 1966-12-02 Arrangement for counterbalancing the forces in crankshaft driven machines Expired - Lifetime US3422688A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1665465A CH427442A (en) 1965-12-02 1965-12-02 Device for mass balancing in machines driven by a crank drive

Publications (1)

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US3422688A true US3422688A (en) 1969-01-21

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US (1) US3422688A (en)
CH (1) CH427442A (en)
DE (1) DE1301670B (en)
FR (1) FR1503203A (en)
GB (1) GB1151249A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776046A (en) * 1971-09-27 1973-12-04 Niagara Machine & Tool Works Inertia balancing means for power presses
US3973505A (en) * 1975-10-31 1976-08-10 The Singer Company Tufting machines
US4606587A (en) * 1985-01-08 1986-08-19 Automated Quality Technologies, Inc. Precision air slide
US4674357A (en) * 1984-04-27 1987-06-23 Aida Engineering, Ltd. Balancing device for press
US4800777A (en) * 1985-09-03 1989-01-31 Aida Engineering, Ltd. Dynamic balancing device for press
US4817456A (en) * 1985-09-07 1989-04-04 Aida Engineering, Ltd. Dynamic balancing device for press
US4995544A (en) * 1986-12-09 1991-02-26 Allwood, Searle & Timney (Holdings) Limited Friction welding apparatus
US5282397A (en) * 1992-03-19 1994-02-01 Briggs & Stratton Corporation Engine balancing system having at least one pivoting counterbalance weight
EP2094958A1 (en) * 2006-08-09 2009-09-02 Whisper Tech Limited A reciprocating piston machine with oscillating balancing rotors
US8739595B2 (en) 2007-06-28 2014-06-03 Bruderer Ag Punching press
WO2020211931A1 (en) * 2019-04-16 2020-10-22 Bruderer Ag Punching press

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT342178B (en) * 1973-04-30 1978-03-28 Braun Anton PISTON MACHINE
CH581281A5 (en) * 1974-09-03 1976-10-29 Bruderer Ag
DE3029417A1 (en) * 1980-08-02 1982-03-11 Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg POLISHING OR GRINDING MACHINE WITH ANOTHER AXIAL MOVABLE AS WELL AS A ROTATING SPINDLE CARRYING FROM A POLISHING TOOL
CH679471A5 (en) * 1989-05-03 1992-02-28 Bruderer Ag
EP0455988B1 (en) * 1990-05-09 1993-10-06 Bruderer Ag Apparatus for balancing the inertia forces in a punching machine
DE4233460C2 (en) * 1992-10-05 1995-11-23 Wifag Maschf Device for avoiding vibrations in printing machines
PL2138267T3 (en) 2008-06-09 2011-10-31 Homag Holzbearbeitungssysteme Ag Workpieces machining unit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US716786A (en) * 1902-09-11 1902-12-23 Blake Terry Automatic balance attachment for windmills.
US1085556A (en) * 1912-04-25 1914-01-27 Truman Evans Balancing device for pumps.
US1113235A (en) * 1914-03-09 1914-10-13 Andrew Moser Pump-operating mechanism.
US2501631A (en) * 1944-11-24 1950-03-21 Scintilla Ag Mechanism for converting rotary motion to reciprocatory motion

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT217244B (en) * 1956-01-09 1961-09-11 Vyzkumny Ustav Naftovych Motoru
NL280750A (en) * 1961-07-14

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US716786A (en) * 1902-09-11 1902-12-23 Blake Terry Automatic balance attachment for windmills.
US1085556A (en) * 1912-04-25 1914-01-27 Truman Evans Balancing device for pumps.
US1113235A (en) * 1914-03-09 1914-10-13 Andrew Moser Pump-operating mechanism.
US2501631A (en) * 1944-11-24 1950-03-21 Scintilla Ag Mechanism for converting rotary motion to reciprocatory motion

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776046A (en) * 1971-09-27 1973-12-04 Niagara Machine & Tool Works Inertia balancing means for power presses
US3973505A (en) * 1975-10-31 1976-08-10 The Singer Company Tufting machines
US4674357A (en) * 1984-04-27 1987-06-23 Aida Engineering, Ltd. Balancing device for press
US4606587A (en) * 1985-01-08 1986-08-19 Automated Quality Technologies, Inc. Precision air slide
US4800777A (en) * 1985-09-03 1989-01-31 Aida Engineering, Ltd. Dynamic balancing device for press
US4817456A (en) * 1985-09-07 1989-04-04 Aida Engineering, Ltd. Dynamic balancing device for press
US4995544A (en) * 1986-12-09 1991-02-26 Allwood, Searle & Timney (Holdings) Limited Friction welding apparatus
US5282397A (en) * 1992-03-19 1994-02-01 Briggs & Stratton Corporation Engine balancing system having at least one pivoting counterbalance weight
EP2094958A1 (en) * 2006-08-09 2009-09-02 Whisper Tech Limited A reciprocating piston machine with oscillating balancing rotors
EP2094958A4 (en) * 2006-08-09 2009-11-11 Whisper Tech Ltd A reciprocating piston machine with oscillating balancing rotors
US20100176591A1 (en) * 2006-08-09 2010-07-15 Donald Murray Clucas Reciprocating piston machine with oscillating balancing rotors
US8739595B2 (en) 2007-06-28 2014-06-03 Bruderer Ag Punching press
WO2020211931A1 (en) * 2019-04-16 2020-10-22 Bruderer Ag Punching press

Also Published As

Publication number Publication date
DE1301670B (en) 1969-08-21
CH427442A (en) 1966-12-31
GB1151249A (en) 1969-05-07
FR1503203A (en) 1967-11-24

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